Pneumatic motor.



PATENTED JULY 17, 1906.

P. WIGGEN. PNBUMATIG MOTOR. APPLIUATION FILED SEPT. as. 1905.

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PATENTED JULY 17, 1906i P. WIGGEN. PNEUMATIC MOTOR.

APPLICATION FILED SEPT. 23. 1905.

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UNITED sTATEs PATENT oEEIoE.

Specification of Letters Patent.

Patented July 17, 1906.

Application ile. September 23, 1905. Serial No. 279,769.

Tora/ZZ whom, t may concern:

Be it known that I, FEDER WIGGEN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Pneumatic Motors, of which the following is a specication.

This invention relates to improvements in that class of motors adapted for operation by pneumatic pressure, and while it is more especially intended for use in operating music-sheets of self-playing musical instruments yet it is applicable for other purposes; and it consists in certain peculiarities of the construction, novel arrangement, and operation of the various parts thereof, as will b e hereinafter more fully set forth and specifically claimed.

The principal obj ect of the invention is to provide a simple, practical, and efficient motor of the above-named character especially adapted for operation by suction or exhaust air-current, which shall be so constructed that the driving or crank shaft shall have a continuous and uniform movement, and dead-centers thereof will be overcome or obviated.

A further object of the invention is to so construct the parts of the device that there will be no leakage of air and the springs ordinarily employed to hold the valves against their seats will be dispensed With.

Other objects and advantages of the invention will be disclosed in the subjoined description and explanation.

In order to enable others skilled in the art to which my invention pertains to make and use the same, I will now proceed to describe it, referring to the accompanying drawings, in whichp Figure 1 is a face view in elevation of a motor embodying my invention. Fig. 2 is a cross-sectional view taken on line 2 2 of Fig. 1 looking in the direction indicated by the arrows. Fig. 3 is a plan view of the parts when occupying the positions shown in Fig. 1. Fig. 4 is a fragmental perspective view of a portion of the supporting-frame or main casing, showing one of the bearings for the shafts which carry the valve-supporting arms. Fig. 5 is a face view in elevation and partly in section showing a portion of the casing removed and illustrating the valves in different positions from that shown in Fig. 1. Fig. 6 is a cross-sectional view taken on line 6 6 of Fig. 5 looking in the direction indicated by the arrows. Fig. '7 is a detached side view of a portion of one of the adjustable bars which connect the valve-shafts to the pitmen at their ends adjacent to the crankshaft, showing by dotted lines different positions said bars will assume in the operation of the device. Fig. 8 is a face view of one of the valves,.showing it detached. Fig. 9 is a detached perspective view of one of the brackets for the valve-shafts, and Fig. 1() is an end view of the crank-shaft.

Like numerals of reference refer to corresponding parts throughout the different views of the drawings.

The reference-numeral 12 designates ythe .main casing or supporting-frame, which is rectangular in shape and has transversely mounted on one of its surfaces a series of pneumatics 13, 14, and 5, of any well-known construction. As is clearly shown in Figs. 2, 5, and 6 of the drawings, the main casing or supporting-frame 12 is provided in its lower portion with a longitudinallyextending chamber or conduit 16, which communicates at one of its ends with lan exhaust or suction port 17, to which an exhaust device or pumping-bellows (not shown) may be connected. On the surface of the frame 12 opposite that on which the pneumatics are mounted are provided separate chambers 18,19, and 20, each of which has communication through ports 21 with the exhaust-conduit 16, and

each of said chambers also havey communication through outlet-posts 22 with the interior of their respective pneumatics, as is clearly shown in`Figs. 2 and 6 of the drawings. To form the chambers 18, 19, and 20, longitudinally-extending cleats 23 and 24 are secured in parallelism to the frame 12, and said cleats are united by transverse portions 25, as shown in Fig. 5 of the drawings. Located on the outer surface of the pieces 25 and the cleat 23 is a late or board 26, which abuts against the c eat 24 and may be secured in place by means of screws 27 or otherwise, thustightly closing said chambers. The upper portion of the frame 12 is provided with a series of ports 28 for the inlet of atmospheric air, and, as shown, one of said ports is employed for each of thepneumatics. Longitudinally secured to each of the movable members 29 of each of the pneumatics, which IOO member is hinged at one of its ends to the iixed member 30 thereof and is connected at IIO I tions on each side of said shaft,

' heads thereto.

its other end and at its sides to saidwfixed member by means ofa membrane 31 of any suitable material, is a bar 32, to which is pivotally secured one end of a pitman 33, the other end of which is loosely mounted on the crank 34 of the crank-shaft 35, which shaft is j ournaled on brackets 36, secured to the main casing or supporting-frame. As shown, and more particularly in Fig. 10, the crankshaft 35 is provided with three cranks 34,

`which are preferably arranged at angles to one another of about one hundred and twenty degrees. That end of each of the pitmen which is connected to the crank-shaft 35 is provided with an extension 37, to which is ivotally secured one end of an adjustable ar, which comprises two 'pieces 38 and 39, the latter of which is provided with a longitudinal slotv 40 for the rece tion of screws 41, which pass through said s ot and engage the piece 38, so as to hold the piece 39 with their The outer or free end of each of the members 39 of the adjustable bars is pivotally secured to a block 42, which is oosely mounted on the outer end of a rod 43, the other end kof each of which is rigidly secured to a rock-shaft 44, which is j ournaled in suitable bearings 45, transversely formed in the cleat 24 on the main frame. Each of the shafts 44 carries an arm 46, which is located on said shaft at right angles to the rod 43 thereon and extends in opposite direc- Secured on one of the ends of each ofthe arms 46 is a valve 47, used for opening and closing the intake-ports 28, and secured on the other end of each of said arms is a valve 48, used for "transverse channel 49, which may be lined opening and closing the ports 21, which lead from the chambers 18, 19, and 20 to the exhaust-conduit. The series of valves 47 and 48 are substantially the same in construction except that each of the valves 48 has its ends curved, as shown in Fig. 8 of the drawings, in which gure it will be seen that the outer or upper surface of the valve is provided with a with felt 50 and which leads toy an opening 51, in which is formed a recess 52 for the reception of the downturned ends of the arms 46, which carry said valves. The plate orboard v26 has mounted on its upper portion a number of brackets 53, one for each of the rockshafts 44, and each of said brackets is provided in its upper portion with a bearing 54 for its shaft and with an extension 55, in which is located a screw 56, the inner end of which will rest against the outer end of the two movements-that is, a lateral movement as well as a back-and-forth motion imparted thereto by the cranks of the crankshaft.

From the foregoing and by reference to the drawings it will be seen and readily understood that when the parts are in the positions shown in Figs. 1 and 3 air will be exhausted from the pneumatic 15 and chamber 20 through the ports 22 and 21 and conduits 16 and 17, thus causing said pneumatic to collapse and permitting atmospheric air to pass through the port 28 into the pneumatic 13, thus inflating it, which operation will rotate the crank-shaft, thereby causing the valvecarrying arms 46 to rock or oscillate, in which operation air will be exhausted from the pneumatic 13 and chamber 18 through the ports 22 and 21 and conduits 16 and 17, when in the further rotation of the crank-shaft air will be exhausted from the pneumatic 14 and chamber 19 through theports 22 and 21 in said chamber and through the conduits 16 and 17, thus permitting atmospheric. air to again be taken into the pneumatic 15,- when the same operation will be repeated. In the operation of the device it will be understood that air is caused to pass through the ports 28 and 21 by reason of exhaust-pressure and that the valves used for opening and closing said ports will be drawn toward their respective seats by the suction, thus dispensing with the necessity of springs usually employed to hold the valves close to their seats.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

ing an exhaust-conduit and rovided with inlet and exhaust orts, of a c ambered casing inclosing the ex aust-ports, a series of pneu,

matics on the casing and having communication with the inlet ports and exhaust-conduit, a crank-shaft j ournaled on the main frame, connections uniting the pneumatics to the cranks of said shaft, a series of rock-shafts journaled on the frame, an arm mounted on each of said shafts and extending in opposite directions therefrom, a valve on one end of each of said arms to open and close the inletports and a valve on the other end of each of said arms to open and close the exhaust-ports, and connections uniting the rock-shafts and cranks of the crank-shaft, substantially as described.

2. In a pneumatic motor, the combination with a main casing or supporting-frame having an exhaust-conduit and provided with inlet and outlet ports-and ports leading to the exhaust-conduit, of a chambered casing inclosing the outlet and exhaust ports, a series of pneumatics mounted on the casing and having communication with the inlet and outlet ports thereof, a crank-shaft j ournaled on the main frame, pitmen connecting the IOO IIO

pneumatics to the cranks of said shafts, a series of rock-shafts journaled on the frame, an arm mounted on each of said shafts and eX- tending in opposite directions therefrom, valves on the ends of said arms to open and close the inlet and exhaust ports, a rod on each of said shafts extending at right angles to the arms thereof, a block movably mounted on the free end of each of said rods, an

adjustable bar pivoted at one of its ends Yto Io each of said blocks, and loosely connected at its other end to each of the cranks on the crank-shaft, substantially as described.

FEDER WIGGEN.

Witnesses CHAs. C. TILLMAN, M. A. NYMAN. 

